AWA DVOR52D设备功率放大器故障分析
2018-09-14陈平张家明
陈平 张家明
摘要:DVOR52D由澳大利亚AWA公司出品,近年来AWA被INDRD公司收购,升级了遥控和监视功能,监控的参数更加翔实,很多需要测量的数据,通过本地键盘或远端监视电脑键盘查询,在显示屏上就可以看到很方便。对于AWA设备从这些年来云南地区工作的情况来看,其载波功放部分功率大,发热量最高,故障率较高。由于该设备集成化程度较低,每块板件都可以维修。
关键词:(DVOR)多普勒全向信标;(CPA)载波功率放大器;(CMP)载波调制与保护
中图分类号:TP311 文献标识码:A 文章编号:1009-3044(2018)16-0212-02
Some Experience on AWA DVOR52D Equipment of Power Amplifier
CHEN-Ping,ZHANG Jia-ming
(Yunnan ATM Sub_Bureau,CAAC,Kunming 650200,China)
Abstract:DVOR52D is produced by Australian AWA company. In recent years, AWA has been acquired by INDRD Corporation. The remote control and monitoring functions have been upgraded. The monitoring parameters are more detailed. Many data to be measured are queried through the local keyboard or remote monitoring computer keyboard. It can be seen very convenient. Regarding the AWA equipment work situation in Yunnan over the years, its carrier power amplifier has a large power, maximum heat output, and a high failure rate. Due to the low degree of integration of the device, each board can be maintained.
Key words:(DVOR) Doppler omnidirectional beacon; (CPA) Carrier Power Amplifier; (CMP) Carrier Modulation and Protection
1簡述
某信标台AWA DVOR/DME设备担负某大型机场航路导航,兼有两条跑道北边进近引导功能。DVOR二号机工作时告警自动转换到一号机,技术人员到达台站后重新开启工作正常,由于每天都有800多个航班,检查时又不能随便换机,一时难以找到故障点,这样持续了近一年的时间。监控器记录有下列告警:正向功率、负载波、30HzAM、伴随SGN板失锁灯亮。在这期间一度认为SGN板失锁引起,更换板键后确认SGN正常,故障点在载波攻放通道。后通过对技术资料的认真分析,找出了故障的关键测试点,现通过下面的阐述来说明,这类故障关键点及维修调整方法。
2 CMP对功率放大器CPA的监控保护
该DVOR设备功率为100瓦,有两块载波功率放大器CPA。从载波产生器CGD送来的16瓦载波信号,送到一块外挂的1A71166功率分配/功率合成器,分成两路8瓦的射频信号,分别送到CPA1和CPA2,每块CPA通过内部的功率分配/功率合成器,又分成各4瓦的射频信号,经其中两块1A71164放大板各放大到25瓦,由功率合成器合成50瓦射频信号输出,两块CPA由外挂合成器合成100瓦。……
